Tube expander



Feb. 27, 1923.

2 sheets-sheet l W. F. SAWADSKI TUBE EXPANDER Filed Jari. 51, 1921vATTORNEY Feb. 27, 1923.

W. F. SIAWADSKI TUBE EXPANDER Filed Jan, 51, 1921 2 sheets-sheet 2 d1/fnINVENTQR ATORNEY WITNBS:

Patented eb. 27, i923@ f entre WILLIAM r. snwnnsnr', or 4orientansfron,sourir CAROLINA.

TUBE EXPANDER;

Application led .'lanuary, 1921. Serial-:toA 441,344.,

To aZZwz'o'm/z'tmay concern.'

Be it known that l, lll/intuir F. Sewansnr, a citizen oi the UnitedStates, residing at 22 Laurens St., Charleston, in lthe county 'ot'Charleston and State otSouth. Carolina.,l have invented new and use'lulimprovements in Tube Expanders, of which the following is aspeciication.

In the kpresent constructionot enpanders torvthe tubes of marineboilers, a conical drill which is `freely movable longitudinally throughthe open end of the stock contacts with rollers and the rapid turning otthe stool; by a suitable machine forces the conical memberoutward of thestock 'and consequently projects the expanding rollers. No means isprovidedvt'or adjusting the conical member, and aboard vessels wheresuit ableniachines for operatingsuch enpanders are noti installed, thesetools cannot be used successfully even when the tube is to be expandedat the upper end thereo't and cannot be used at all when the tube is tobe expanded at its lower end'. 'C 1 It may therefore be consideredthepri-V mary object of the present invention to produce a tube expanderhaving .means tor projecting VVthe roller expanding elements through thestock to anyy desired degree, and

whereby the expander may be successfully employed either in an uprightvertical posxtion, a downright vertical position, or at any desiredangle with respectk to the arrangement ot the tubes to be expanded.

The foregoing, and other objects which will appear as the nature of theinvention is better understood, may be accomplished by a construction,combination and operative association of elements, such as is disclosedby the drawings which accompany and which formpart of this application.

In the drawings Figure 1 is a plan view of the improve` ment.

Figure 2 is a sectional view on the line 2-2 of Figure 1.

Figure 3 is a transverse sectional view on the line 3-3 of Figure 2.

Figure 4; is a similar sectional view on the line 1 -4 of Figure 1.

Figure 5 is a transverse sectional view ony line 5-5 of Figure 2. Figure6 is a similar sectional view on line 6-6 or" Figure 2.

Figure 7 is a view looking toward the headed end of the outer portion ofthe stock which carries the expanding rollers.

Figure 8`is .ai similar view,-looking-towanctthe head ontheothersectionof the stock,

Figure 9 is a'. perspective vieW 0f the cone-k shaped rollerprojectingpin.

The'stoclr ot my improvementgcomprises twosections, which, forconvenienceinmanutacture, and also forv convenience in assem blage oiparts, is constructed of two' sec-- tions. i The outerv and longersection is indi;- cated by! the numeral l, and theinner. and, shortersection is indicatedfby thegnumeral 2. Y As inthe general construction,the, confronting endsot the sect-ions 1 and 2 are ,provided with roundedenlargements forming ,A the same with heads 3, the-said'heads designed@'to abut and are rconnected together-by ree movable means such-asheadedbolts 4.. The inner section 2 is provided'with a; widened portionwhich extends longitudinally 'from its head 3, the said portion beingindicated by the numeral 5. The head 3 of the section 2, and itsenlargement 5 havea rounded pocket 6, therein, and the inner wall l Tprovided by the pocket is bored longitudinally to provide threeequi-distantly spaced rounded openings l8 that `communicate withelongated slots Qin, the said section 2. The slots Qterminateawayfromthe` outer end of the section 2, and the opposed -.walls provided bythe slots are rounded inwardly in correspondence to the opposed walls`provided by the respective openings 8. The openings S and the slots 9communicate with the central rounded bore 10 of the section 2, andpassed through each of the openings and enering each ot' the slots is aroller expanding element 11. Theslots and openings are so arranged thatthe rollers 11 may project into the bore 10, when the outersurfacesthereof are in a line with the outer surface or periphery of thesection 2.

The roundedhead 3 of the seetion2 is peripherally formedv with acontinuous groove 12, and the rounded head of the section 1 is providedwith a peripheral flange 13 that is designed to be received in thegroove 12, when the sections l and 2 are assembled.

lThe section 1 is provided with an elongated pockets provided by theslots and openings,

I arrange in the pockets 6, over the inner and rounded ends of thesaidrollers, a bearing vwasher 16. Over this washer, l position a sleeve 17.This sleeve is retained in proper position through the medium ofcomparatively small bolts 18 that pass transversely through theenlargement 5 and have their' threaded ends received in threadedopenings in the sleeve.

The stock of the tool is provided with an elongated slot 19. This slotis disposed in a line with the end wall of the bore 1l of the section 17passes through the heads of both of the sections and terminates a slightdistance inward of the inner wall 7 provided by the pocket 6.

c Arranged for slidable movement throngli the bore of the stock is aconical pin 20. fin the widened end of this pin which is received in thesection 1 of the stock7 I secure a, handle member 21 whichissubstantially ilshaped in plan whereby the reduced portion thereof`which is Connected to the pin, may freely slide through the elongatedslot in the stock. The handlf.` 21 may be adjusted to move the pinlongitudinally and the said pin contacting withY the expanding rollerswill force the same outwardly through their slots to properly bearagainst the tube to be expanded.

Through centriingal force. incident to the rapid revolving of the stoel(the pin will automatically be moved outwardly oithe said stoel; toproject the rollers when the iinproveinent is held at a. downwardvertical or at a downward angle slightly beyond the vertical, but thedegree in which the rollers are projected may be readily regulated byarranging the head oi the pin at any desired position on the stock. ltshould have been stated that the elongated slot in the stoolr has itswalls disposed at opposite inclinations7 corresponding to the anglesides or edges oi the head, and the contacting engagement or the headwith the said walls will hold the pin when the latter is retained atsaid positions, and this is most especially true when the improvement isemployed for expanding tubes that are disposed horizontally or atvarying angles below the horizontal, as the irictional engagementbetween the handle and the walls oi the slots is sufficient to preventthe pin being moved longitudinally by centriiz igal iorce.

Having described thei vention, l claim ln a tube expander, a stockhaving a bore therein, elongated slots Whose opposed side walls arerounded inwardly and which provide pockets thereby, expansion rollers'freely seated in the pockets, a conical pin movable longitudinally inthe bore for contacting with the rollers and projecting the same. saidstock having an elongated slot therein arranged between the innerterminal of the bore and inwardly of the rollers, and the longitudinalwalls provided by the slot being arranged at opposed angles, and asubstantially V-shaped head on the widened end or the pin projectingthrough the slot and whose angle side surfaces of which are designed tofrietionally engage with either of the angle walls provided by the slot.when the steelt is revolved`r as and for the purpose set forth.

ln testimony whereof I ailix my signature.

vi'fiLLniM r. sAwADsirr.

